CO2 gasification behavior of biomass chars in an entrained flow reactor

Kawnish Kirtania, Sankar Bhattacharya

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Chars of different particle sizes (150-250, 500-600 micrometres) from two different biomass species (spruce and coconut shell) were gasified under entrained flow condition in the presence of CO2 at different temperatures (800, 900 and 1000 degrees C). The concentration of CO2 was also varied between 5 and 20 to determine its effect. It was found that significant improvement in gasification efficiency is possible by lowering the particle size below 0.5 mm. This finding was attributed to the spruce char as it showed the highest (approx 50 ) conversion for the lowest particle size. It was also revealed that less reactive chars (coconut shell) were insensitive to the particle size and temperature variation for CO2 as a gasifying agent. Generally, pyrolysis process dominates the conversion process during raw biomass gasification. No tar component was observed during gasification at 1000 degrees C. As a whole, this study provides useful insight about the entrained flow gasification process of biomass chars with CO2
Original languageEnglish
Pages (from-to)49 - 59
Number of pages11
JournalBiomass Conversion and Biorefinery
Volume6
Issue number1
DOIs
Publication statusPublished - 2016

Cite this

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CO2 gasification behavior of biomass chars in an entrained flow reactor. / Kirtania, Kawnish; Bhattacharya, Sankar.

In: Biomass Conversion and Biorefinery, Vol. 6, No. 1, 2016, p. 49 - 59.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Kirtania, Kawnish

AU - Bhattacharya, Sankar

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AB - Chars of different particle sizes (150-250, 500-600 micrometres) from two different biomass species (spruce and coconut shell) were gasified under entrained flow condition in the presence of CO2 at different temperatures (800, 900 and 1000 degrees C). The concentration of CO2 was also varied between 5 and 20 to determine its effect. It was found that significant improvement in gasification efficiency is possible by lowering the particle size below 0.5 mm. This finding was attributed to the spruce char as it showed the highest (approx 50 ) conversion for the lowest particle size. It was also revealed that less reactive chars (coconut shell) were insensitive to the particle size and temperature variation for CO2 as a gasifying agent. Generally, pyrolysis process dominates the conversion process during raw biomass gasification. No tar component was observed during gasification at 1000 degrees C. As a whole, this study provides useful insight about the entrained flow gasification process of biomass chars with CO2

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